After_was about ten minutes,the teacher gave the students the correct answer to the question....After_was about ten minutes,the teacher gave the students the correct answer to the question.a.that b.it c.which d.what这是定语从句,还是宾语从

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After_was about ten minutes,the teacher gave the students the correct answer to the question....After_was about ten minutes,the teacher gave the students the correct answer to the question.a.that b.it c.which d.what这是定语从句,还是宾语从
1 这是宾语从句缺主语,作after的介词宾语,整个前面分句作状语
2 不能用it,很简单后面的真正的主语在哪里呢?一般来说it是形式主语,都用于句型It is ...that/to do/doing 这样的结构
It is good for us to learn English

这里强调的是“应该是”，按英文习惯只能用what，而不是it。这里的凭语感，是与After what turned out to be about ten minutes是相通的。
另外，请注意逗号只好一定要留一空格。句号、分号、问号、感叹号后亦然。
欢迎追问。

答案是d, what.
1. 这是宾语从句缺主语；
2. it 作形式主语是有句型要求的，而这个句子不符合句型。
从语法上来讲，after 是一个介词，后面缺一个介词宾语； was 是一个动词，前面缺一个主语。凡是一个空缺两个成分的，都填what.

After_was about ten minutes,the teacher gave the students the correct answer to the question....After_was about ten minutes,the teacher gave the students the correct answer to the question.a.that b.it c.which d.what这是定语从句,还是宾语从 about ten to For about ten 是at about ten years 还是for about ten years About ten minutes的提问 The bus ｛｝ (ride) takes about ten minutes （）is it?it is about ten. Mr Green Lived in China for about ten years.对for about ten years提问 he goes to bed at about ten对at about ten提问 It'about ten kilometers from the school.(划线部分提问）划线部分：about ten kilometers . About ten to ten.的中文是什么?Whai is the matter with John?的中文是什么 It's ____ half past ten填介词,是不是about? tens of thousands等不等于about ten thousand It takes me about ten minutes________ to school every day. she goes to bed at about a quarter to ten. About ten ( )(German) visited our school the day before yesterday . usually,twenty,about,Mike,ten,exercises,at.连词成句! She ______(read) more than ten magazines about UFOs.